Writing isn't always easy, I often dread it the same way Anne Lamott said she did, but when I just start out writing something eventually it does get easier. Even if at first it seems, as the author says, "incoherent and hideous," it at least gets things started.
The most ingenious works had to have come from something, they don't usually just miraculously appear complete and perfect. Everything from Mary Shelly's Frankenstein; or, The Modern Prometheus, to the Berenstain Bears had to start somewhere. The first draft is just a stepping stone on the way to greater things. Once you've gotten everything down you can start sorting out the useful information and best parts and start stitching it together to make it legible.
Once everything been made more legible and coherent you've got a second draft, and revising it again and again eventually you, hopefully you'll have something worth reading. If not you could always write for Buzzfeed and rely on clickbait. However, if you do something you're proud of and you’re ready for the world to see it, congrats! You’ve made your final draft! Just remember how it started as your shitty first draft, proving you really can polish a turd.